Can we check a mail has been read or not

Unfortunately, it's not possible to directly check if an email has been read or not, as email clients and servers don't provide a built-in way to track this information. Here's why:

  1. Email protocols: Email protocols like SMTP, POP3, and IMAP don't provide a mechanism to track read status. They're designed for sending and receiving emails, not for tracking user interactions.
  2. Email client behavior: Email clients like Gmail, Outlook, or Apple Mail don't send a notification to the server when an email is read. They only update the email's status in the client's local database.
  3. Security and privacy concerns: If email providers were to track read status, it would raise significant security and privacy concerns. Users might feel their email activity is being monitored, which could lead to decreased trust and adoption of email services.

However, there are some indirect ways to determine if an email has been read:

  1. Email client features: Some email clients, like Gmail, offer features like "Read Receipts" or "Delivery Reports" that can notify the sender when an email is opened or read. These features are usually opt-in and may not be available for all email clients.
  2. Tracking pixels: Some email marketers use tracking pixels (also known as web beacons) to track email opens and clicks. These pixels are small images embedded in the email that load when the email is opened, allowing the sender to track engagement metrics.
  3. Third-party services: There are third-party services that offer email tracking and analytics, such as Mailchimp, Constant Contact, or Yesware. These services can provide insights into email engagement, including read status, but may require integration with your email client or server.

Keep in mind that these methods are not foolproof and may not work for all email clients or scenarios. If you're looking to track email engagement, it's essential to understand the limitations and potential drawbacks of these methods.